/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package javax.swing.plaf.metal;

import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import java.awt.*;

/**
 * The Metal implementation of ProgressBarUI.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Michael C. Albers
 */
public class MetalProgressBarUI extends BasicProgressBarUI {

  private Rectangle innards;
  private Rectangle box;

  public static ComponentUI createUI(JComponent c) {
    return new MetalProgressBarUI();
  }

  /**
   * Draws a bit of special highlighting on the progress bar.
   * The core painting is deferred to the BasicProgressBar's
   * <code>paintDeterminate</code> method.
   *
   * @since 1.4
   */
  public void paintDeterminate(Graphics g, JComponent c) {
    super.paintDeterminate(g, c);

    if (!(g instanceof Graphics2D)) {
      return;
    }

    if (progressBar.isBorderPainted()) {
      Insets b = progressBar.getInsets(); // area for border
      int barRectWidth = progressBar.getWidth() - (b.left + b.right);
      int barRectHeight = progressBar.getHeight() - (b.top + b.bottom);
      int amountFull = getAmountFull(b, barRectWidth, barRectHeight);
      boolean isLeftToRight = MetalUtils.isLeftToRight(c);
      int startX, startY, endX, endY;

      // The progress bar border is painted according to a light source.
      // This light source is stationary and does not change when the
      // component orientation changes.
      startX = b.left;
      startY = b.top;
      endX = b.left + barRectWidth - 1;
      endY = b.top + barRectHeight - 1;

      Graphics2D g2 = (Graphics2D) g;
      g2.setStroke(new BasicStroke(1.f));

      if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
        // Draw light line lengthwise across the progress bar.
        g2.setColor(MetalLookAndFeel.getControlShadow());
        g2.drawLine(startX, startY, endX, startY);

        if (amountFull > 0) {
          // Draw darker lengthwise line over filled area.
          g2.setColor(MetalLookAndFeel.getPrimaryControlDarkShadow());

          if (isLeftToRight) {
            g2.drawLine(startX, startY,
                startX + amountFull - 1, startY);
          } else {
            g2.drawLine(endX, startY,
                endX - amountFull + 1, startY);
            if (progressBar.getPercentComplete() != 1.f) {
              g2.setColor(MetalLookAndFeel.getControlShadow());
            }
          }
        }
        // Draw a line across the width.  The color is determined by
        // the code above.
        g2.drawLine(startX, startY, startX, endY);

      } else { // VERTICAL
        // Draw light line lengthwise across the progress bar.
        g2.setColor(MetalLookAndFeel.getControlShadow());
        g2.drawLine(startX, startY, startX, endY);

        if (amountFull > 0) {
          // Draw darker lengthwise line over filled area.
          g2.setColor(MetalLookAndFeel.getPrimaryControlDarkShadow());
          g2.drawLine(startX, endY,
              startX, endY - amountFull + 1);
        }
        // Draw a line across the width.  The color is determined by
        // the code above.
        g2.setColor(MetalLookAndFeel.getControlShadow());

        if (progressBar.getPercentComplete() == 1.f) {
          g2.setColor(MetalLookAndFeel.getPrimaryControlDarkShadow());
        }
        g2.drawLine(startX, startY, endX, startY);
      }
    }
  }

  /**
   * Draws a bit of special highlighting on the progress bar
   * and bouncing box.
   * The core painting is deferred to the BasicProgressBar's
   * <code>paintIndeterminate</code> method.
   *
   * @since 1.4
   */
  public void paintIndeterminate(Graphics g, JComponent c) {
    super.paintIndeterminate(g, c);

    if (!progressBar.isBorderPainted() || (!(g instanceof Graphics2D))) {
      return;
    }

    Insets b = progressBar.getInsets(); // area for border
    int barRectWidth = progressBar.getWidth() - (b.left + b.right);
    int barRectHeight = progressBar.getHeight() - (b.top + b.bottom);
    int amountFull = getAmountFull(b, barRectWidth, barRectHeight);
    boolean isLeftToRight = MetalUtils.isLeftToRight(c);
    int startX, startY, endX, endY;
    Rectangle box = null;
    box = getBox(box);

    // The progress bar border is painted according to a light source.
    // This light source is stationary and does not change when the
    // component orientation changes.
    startX = b.left;
    startY = b.top;
    endX = b.left + barRectWidth - 1;
    endY = b.top + barRectHeight - 1;

    Graphics2D g2 = (Graphics2D) g;
    g2.setStroke(new BasicStroke(1.f));

    if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
      // Draw light line lengthwise across the progress bar.
      g2.setColor(MetalLookAndFeel.getControlShadow());
      g2.drawLine(startX, startY, endX, startY);
      g2.drawLine(startX, startY, startX, endY);

      // Draw darker lengthwise line over filled area.
      g2.setColor(MetalLookAndFeel.getPrimaryControlDarkShadow());
      g2.drawLine(box.x, startY, box.x + box.width - 1, startY);

    } else { // VERTICAL
      // Draw light line lengthwise across the progress bar.
      g2.setColor(MetalLookAndFeel.getControlShadow());
      g2.drawLine(startX, startY, startX, endY);
      g2.drawLine(startX, startY, endX, startY);

      // Draw darker lengthwise line over filled area.
      g2.setColor(MetalLookAndFeel.getPrimaryControlDarkShadow());
      g2.drawLine(startX, box.y, startX, box.y + box.height - 1);
    }
  }
}
